70021375 has 8 divisors (see below), whose sum is σ = 87386832. Its totient is φ = 56017000.

The previous prime is 70021363. The next prime is 70021397. The reversal of 70021375 is 57312007.

It is not a de Polignac number, because 70021375 - 2¹³ = 70013183 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279961 + ... + 280210.

It is an arithmetic number, because the mean of its divisors is an integer number (10923354).

Almost surely, 2^70021375 is an apocalyptic number.

70021375 is a deficient number, since it is larger than the sum of its proper divisors (17365457).

70021375 is an equidigital number, since it uses as much as digits as its factorization.

70021375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560186 (or 560176 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 70021375 is about 8367.8775684160. The cubic root of 70021375 is about 412.1704745086.

The spelling of 70021375 in words is "seventy million, twenty-one thousand, three hundred seventy-five".